The wheeled humanoid finally gets a spec sheet: 22 DOF, 10 kg, five-second swap

RoboScience, a Beijing embodied intelligence company, released its first robot on August 17: the REX G1, a wheeled humanoid pitched at logistics, manufacturing, retail and eventually domestic work ^[1][2]. The notable thing is not the shape but the disclosure, because the company has published the kind of figures a facilities engineer can check against a doorway and a shift plan rather than a video.

Start with the mechanics. The REX G1 carries 22 degrees of freedom, allocated as two in the head and neck, seven per arm, two in the waist, one lifting axis and three in the wheeled chassis ^[3]. That accounting closes exactly, which is a low bar and one that marketing copy in this category often fails to clear ^[4]. The two arms together are rated for 10 kg, or 22 pounds ^[5], which averages 5 kg per arm if a load is split evenly ^[6]. That is tote-lid territory, not full-tote territory, and it sets the boundary of the job more clearly than any claim about general capability.

The dimensions are written as if someone measured an existing aisle. The robot is 540 mm wide, adjustable from 540 to 640 mm in length, and ranges from 1,100 to 1,700 mm in height, with a working envelope between 0.1 and 2 meters ^[7]. That height range implies 600 mm of vertical travel from the lifting axis ^[8], and 540 mm is about 21.3 inches of width to fit through ^[9]. RoboScience frames this as the opposite of the usual retrofit demand for wider aisles, more turning space or altered shelving ^[10]. Perception is 360-degree stereo vision with adaptive lighting, intended for deep cabinets, reflective shelving, packaging film and low light without added fixtures ^[11]. The vision system can also read storage-location codes after a grasp to confirm placement ^[12].

Two numbers do the most work for a buyer. The first is repeatability of plus or minus 0.1 mm ^[13], reported without a stated test payload, reach or measurement standard, which is where such figures usually move ^[14]. The second is the battery: up to four hours per charge, hot-swappable without shutting down, with work resuming in as little as five seconds ^[15]. Taken at face value, five seconds against a four-hour run is roughly 0.035 percent of the cycle spent swapping, or about 99.97 percent availability before anything else goes wrong ^[16]. That is the claim that turns a robot into a shift asset instead of a day-shift experiment, and it also quietly assumes spare packs, a charging bay and someone to do the swap.

The software is called Visics, which RoboScience describes as a general embodied model on a Vision-Language-Object-Action architecture ^[17]. The company says a world model simulates three-dimensional object trajectories and a separate operation model converts those into control signals ^[18]. Onboard compute is quoted at 2,070 TFLOPS, with perception, decision and control run at the edge to reduce cloud dependence ^[19]. RoboScience also claims "walking, lifting, and grasping at the same time," with zero-space control holding end effectors steady in tight spaces so the machine does not stop and reposition between actions ^[20].

What to watch: nothing here is priced, dated for shipping, or attached to a named customer, and every figure is the vendor's own ^[21]. The missing specs are the operational ones - picks per hour, mean time between failures, payload-derated accuracy, and how many spare batteries a two-shift line needs. The category has moved from adjectives to numbers. The next move is from vendor numbers to somebody else's.